Improved templet for bending- springs



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Efira JOSEPH GATCHELL, OF RAIWAIZ NEW JERSEY.

Laue-.Ms Patent No. 88,624, dma April 6, 1869.

Be itknown that I, JOSEPH GATCHELL, of Rahway, Union county, New Jersey, have invented certain Impr'ovcments in a Machine for Bending Springs for Wagons,&c., patented by me, on the 3d day of November, 1868,- being No. 83,625; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and letters of reference therein.

The improvements relate to the templet marked R, in my patent dated November 3, 1868, and to the mechanism for operating the rolls, marked C, in the same patent. Y

Having found, by practice with the templets, as first invented and patented, that the springs when hot were wider (by reason of the expansion of the metal composing them) than when cold, I devised the arrangement shown in Figures 4 and 3, WhereR represents the templet upon which the springsX are laid to be bent, said templet being secured' to a sliding base, N, which has a motion, when desired, at right angles to the spring.

This base N slides upon a bed-piece, M, which is provided with dovetails L, to guide the base N, when moved. l

This bed-piece M is furnished at one side with a veriically-projecting flange, Y, to which various vertical flanges, O, can be secured, by screws T, thus forming a gauge, in connection with the flanged adjustable gauge P, to guide the springs sideways when being bent.

hot, the spring, when cool, being narrower when cooled, would have a certain space to move in sidewise, and be crooked in the act of cooling just that amount.

I, therefore, provide-a screw, S, turned by acrank, T, or anyequivalent device, to move the base N, upon which the templet R and the adjustable flange P are fastened, toward vor away from the stationary iiangc, or gauge 0.

This arrangement enables one to open 'quickly the gauges O and P, to such an amount that the springV drops in readily upon the templet R, and then to pinch the spring sideways asit is bent hot, and also to con.-

'tinue the pinching pressure as the spring cools and decreases in width.

The removable flanges O, Which are made of the proper length and height to suit each pattern of spring, are kept from touching the iixed flange Y, by resting against certain seats Z upon the iia'nge Y.

These seatsZ are designed to produce an open space under the rear edge of the templet R, through which scale, or dirt may drop out of the way, when the tem'- plet is moved back, by the screw S, to insert a new spring, or plate.

The adjustable anged gauge Pis constructed, as shown, with slots, by which it can be set at any required distance from the iiangc O, to suit springs of various widths.

The templet R is constructed with loose pieces K,

fastened into suitable recesses at each end, which can be made of various lengths, to support the ends ofl springs of several lengths, and of any width required to enter between the ears, made at the head Vofa spring.

The invention of these pieces K enables me to bend springs, from thirty-six .to forty-two inches in length, without any expense for new templets, by simply making pieces K of one, two, or three inches in length to fit at each end of a thirty-siX-inch templet.

It will be noiced that 'the templet R is held to the base N by screws U, so that it can be readily removed, and a different one used in its place.

I iiud that in bending one plate'of a spring on topn of another, that the successive plates do not get the right set or rise, as the ends have a tendency to rise when the water is applied to cool them.

I, therefore, place on top of any plate of the spring, before laying on the next plate, a former, (shown in Figure 1,) consisting of a piece of metal, of the same width `as the spring, and of any length desired, and tapered from the middle towardA each end.

This former, in effect, produces a templet of greater convexity, and can be made to give the plate any desired curvature.

I also find Vthat when two rollers are employed in conjunction to bend springs, they do not l press the plate, or spring down to the templet at its middle, for

- the reason that the points of contact of the two rolls If these flanges were set the right distance apart, to receive a two-andahalf inch or any other spring, when f are each distant from the middle of the springone-` half the diameter ofthe roll.

I, therefore, lay on the to'p of any hot plate that is being bent, a presser, (shownin Figure 2,) Shaped like the former, and hlllong enough to span the distance between the centres of the rolls.

The pressure of the rolls comes upon the ends of this presser, iig. 2, and it is made sti" enough to press on the middle of the spring, vas a roll would do.

A hole, V, is made in the ilange 0,110 admit a bar, carrying a pin, upon which the hole in the middle of each spring is dropped.

The former and presser, described above, have each a hole at their middle, to drop over this pin.

In my patent of November 3, 1868, I have claimed the combination, substantially as described, of the templet-rolls, bending-levers, and weight. Also, the combination of the series of rolls with the bendinglevers and templet.

I have made an improvement in the mechanism for moving the rolls back and forth, as they bear on the spring, by which a much more firm and reliable motion is secured, while the arrangement remains substantially the same, and the combination the same as claimed November 3, 1868.

This improvement in mechanism for moving the rolls C, I only describe and claim as an equivalent to the cross-head I and bending-levers Y, which I claimed in combination beibre, and claim now as substantially the same thing.

In Figures 5 and 6, is' shown the cross-head I, made hollow to allow of its being weighted when necessary, constructed so that two carriages D (supporting the two bending-rolls C) can slide freely from the middle thread cut on one end, and left-hand thread -cut onv the other end.

This screw has a gear, B, fastened on it at the mid,-

dle, which is driven by gears A and F, and shaft G, which extends upward from the cross-head1', and has a groove cut in it, so as to receive motion from other gearing, as the cross-head slides up and down between suitable guides. l This shaft G is reversed at proper intervals, by suitable mechanism, so as to make the screw E alternately move the carliages D and rolls G back and forth over the spring.

The motion and effect produced are the same as that caused bythe beudiug-levers I formerly employed.

In like manner, I use va screw at each end of the crosshead, to raise and lower it as required, the screws being' reversed by suitable mechanism, the motion of all these screws being regulated by adjustable stops, as in ordinary iron-planing machines.

C lai/ms.

What I desire to claim and secure by Letters Patent, is'- 1. The templet described, consisting of the bedpiece M, the base N, upper templet R, the loose piece used on upper templet R, (shown in iig. 1,) removable at pleasure, flanges 0 and P, and screw S, or its equivaient, for moving the base N upon the bed-piece M, as required to receive and pinch the springs when bending and cooling.

2. The blocks, or loose pieces K, in combination with and applied at the ends of'the templet R, to eX- tend its use to springs of various lengths and widths.

JOSEPH GATCHELL.

Witnesses:

WILLIAM H. Donn,

Trios. S. CRANE. 

